What is the ruling on some institutions in some countries designating a transport vehicle driven by a woman, on condition that it only transports women?

It is permissible for a woman to work in a driving education institution, provided certain conditions are met: adherence to the prescribed Islamic dress, avoidance of unlawful mixing with men, refraining from driving to remote and dangerous places, and not traveling without a mahram (definition). The institution's specific condition of men not riding with women is essential to prevent unlawful seclusion (khalwa (definition)).